AIM: To study the expression of ether à go-go (Eag1) potassium channel in colorectal cancer and the relation- ship between their expression and clinico-pathological features. METHODS: The expression levels of Eag...AIM: To study the expression of ether à go-go (Eag1) potassium channel in colorectal cancer and the relation- ship between their expression and clinico-pathological features. METHODS: The expression levels of Eag1 protein were determined in 76 cancer tissues with paired non- cancerous matched tissues as well as 9 colorectal adenoma tissues by immunohistochemistry. Eag1 mRNA expression was detected in 13 colorectal cancer tissues with paired non-cancerous matched tissues and 4 colorectal adenoma tissues as well as two colorectal cancer cell lines (LoVo and HT-29) by reverse transcription PCR. RESULTS: The frequency of positive expression of Eag1 protein was 76.3% (58/76) and Eag1 mRNA was 76.9% (10/13) in colorectal cancer tissue. Expression level of Eag1 protein was dependent on the tumor size, lymphatic node metastasis, other organ metastases and Dukes’ stage (P < 0.05), while not dependent on age, sex, site and degree of differentiation. Eag1 protein and mRNA were negative in normal colorectal tissue, and absolutely negative in colorectal adenomas except that one case was positively stained for Eag1 protein. CONCLUSION: Eag1 protein and mRNA are aberrantly expressed in colorectal cancer and occasionally expressed in colorectal adenoma. The high frequency of expression of Eag1 in tumors and the restriction of normal expression to the brain suggest the potential of this protein for diagnostic, prognostic and therapeutic purposes.展开更多
AIM：To quantify the association between diabetes and glaucoma using Meta-analysis.METHODS：Pub Med and Embase were searched using medical subject headings and key words related to diabetes and glaucoma.The inclusion ...AIM：To quantify the association between diabetes and glaucoma using Meta-analysis.METHODS：Pub Med and Embase were searched using medical subject headings and key words related to diabetes and glaucoma.The inclusion criteria were：1）the study design was a prospective cohort study;2）the exposure of interest was diabetes;3）the outcome of interest was primary open angle glaucoma（POAG）;4）risk ratios（RR）and the corresponding 95%confidence interval（CI）.Data were pooled using fixed effects models to take into account heterogeneity between studies.Seven prospective studies were selected.Diabetes increased the incidence of glaucoma by 36%（OR=1.36,95%CI=1.25-1.50）.There was no evidence of statistical heterogeneity（I2=0,P=0.53）or publication bias（the funnel plot did not identify obvious asymmetry）.RESULTS：Seven prospective cohort studies were incorporated in this Meta-analysis.The pooled RR of the association between POAG and diabetes based on the risk estimates of the seven cohort studies was 1.36（95%CI=1.24-1.50）,with no significant heterogeneity across studies（I2=0;P=0.526）.The sensitivity analysis yielded a range of RRs from 1.34（95%CI=1.22-1.48）to1.40（95%CI=1.18-1.67）.CONCLUSION：Diabetes is associated with a significantly increased risk of glaucoma.展开更多
AIM：To compare the diagnostic performance of isolatedcheck visual evoked potential（ic VEP） and standard automated perimetry（SAP）,for evaluating the application values of ic VEP in the detection of early glaucoma....AIM：To compare the diagnostic performance of isolatedcheck visual evoked potential（ic VEP） and standard automated perimetry（SAP）,for evaluating the application values of ic VEP in the detection of early glaucoma.METHODS：Totally 144 subjects（288 eyes） were enrolled in this study.ic VEP testing was performed with the Neucodia visual electrophysiological diagnostic system.A 15% positive-contrast（bright） condition pattern was used in this device to differentiate between glaucoma patients and healthy control subjects.Signal-to-noise ratios（SNR） were derived based on a multivariate statistic.The eyes were judged as abnormal if the test yielded an SNR≤1.SAP testing was performed with the Humphrey Field Analyzer II.The visual fields were deemed as abnormality if the glaucoma hemifield test results outside normal limits;or the pattern standard deviation with P〈0.05;or the cluster of three or more non-edge points on the pattern deviation plot in a single hemifield with P〈0.05,one of which must have a P〈0.01.Disc photographs were graded as either glaucomatous optic neuropathy or normal by two experts who were masked to all other patient information.Moorfields regression analysis（MRA） used as a separate diagnostic classification was performed by Heidelberg retina tomograph（HRT）.RESULTS：When the disc photograph grader was used as diagnostic standard,the sensitivity for SAP and ic VEP was 32.3% and 38.5% respectively and specificity was 82.3% and 77.8% respectively.When the MRA Classifier was used as the diagnostic standard,the sensitivity for SAP and ic VEP was 48.6% and 51.4% respectively and specificity was 84.1% and 78.0% respectively.When the combined structural assessment was used as the diagnostic standard,the sensitivity for SAP and ic VEP was 59.2%and 53.1% respectively and specificity was 84.2% and 84.6% respectivlely.There was no statistical significance between the sensitivity or specificity of SAP and ic VEP,regardless of which diagnostic standard was based on.CONCLUSION�展开更多
In vitro antioxidant activities of resveratrol and piceid against peroxynitrite（ONOO-） were examined by the inhibition of 3-nitrotyrosine formation.Trolox was used as a positive control.Resveratrol and piceid exhibi...In vitro antioxidant activities of resveratrol and piceid against peroxynitrite（ONOO-） were examined by the inhibition of 3-nitrotyrosine formation.Trolox was used as a positive control.Resveratrol and piceid exhibited high ONOO--scavenging activities in a concentration dependent manner.The antioxidant activities（the concentration of test compound required to yield a 50% inhibition of tyrosine nitration,IC 50） of resveratrol and piceid against ONOO-were（48.34±0.97） and（74.69±1.49） μmol/L,respectively.Compared with that of trolox[（105.40±1.16） μmol/L],their scavenging activities were 2.2-and 1.5-fold higher for resveratrol and piceid.Formation of nitroresveratrol as shown by UV-Vis spectroscopy and liquid chromatography-tandom mass spectrometry（LC-MS/MS） analysis indicates that resveratrol could directly scavenge ONOO-via nitration reaction.Our results demonstrate that foods and medicinal herbs with resveratrol and piceid as stronger ONOO-scavengers are valuable ingredients and have healthy application in preventing humans from peroxynitrite-mediated oxidative damage by scavenging peroxynitrite efficiently.展开更多
Scale effects are studied on the buckling behavior of bilayer composite plates under non-uniform uniaxial compression via the nonlocal theory. Each isotropic plate is composed of a material that is different from othe...Scale effects are studied on the buckling behavior of bilayer composite plates under non-uniform uniaxial compression via the nonlocal theory. Each isotropic plate is composed of a material that is different from others, and the adhesive between the plates is modeled as the Winkler elastic medium. According to the symmetry, effects of the Winkler non-dimensional parameter, the thickness ratio, the ratio of Young＇s moduli, and the aspect ratio are also considered on the buckling problem of bilayer plates, where only the top plate is under the uniaxial compression. Numerical examples show that the Winkler elastic coefficient, the thickness ratio, and the ratio of Young＇s moduli play decisive roles in the buckling behavior. Nonlocal effect is significant when the high-order buckling mode occurs or the aspect ratio is small.展开更多
InG sP/G s SCH SQW lasers have been prepared by LP-MOCVD. The dependence of t hreshold current density on cavity length was explained. Laser diodes are char acterized by the output power of 1 W to 2 W, threshold curre...InG sP/G s SCH SQW lasers have been prepared by LP-MOCVD. The dependence of t hreshold current density on cavity length was explained. Laser diodes are char acterized by the output power of 1 W to 2 W, threshold current density ( J th ) of 330 A/cm 2 to 450 A/cm 2 and external differe ntial quantum efficiency ( η d) of 35% to 75%, and these characteristics ar e in good agreement with the designed requirement.展开更多
This article proposes a cooperative relaying strategy to efficiently utilize the relaying resources of Interact service providers （ISPs）, speedup distribution and save server bandwidth costs. ISPs cooperatively rela...This article proposes a cooperative relaying strategy to efficiently utilize the relaying resources of Interact service providers （ISPs）, speedup distribution and save server bandwidth costs. ISPs cooperatively relay for each other, and peers assist in distributing and fetching the content as near as possible. Base on the fluid model, a constrained model is derived to get optimized global distribution performance in the channel-based system with limited relaying resources. The multi-objectives of the model are minimizing the average distribution time and the distribution time of the slowest channel. Genetic algorithm （GA） is designed to solve the optimization problem. The relaying strategy based on GA can be run periodically to update the allocation policy of ISPs. The distribution performance of the relaying strategy is analyzed in the experiments and results show that GA can provide proper solutions for various network topologies.展开更多
目的通过对常见蔬菜水果中有机磷农药的基质效应进行全面的分析,探索更加高效的有机磷农药残留检测手段。方法30种(11类)供试蔬果样品分别利用乙腈提取,经QuEChERS净化后,配制溶剂标准工作曲线和基质标准工作曲线,利用气相色谱-串联质谱...目的通过对常见蔬菜水果中有机磷农药的基质效应进行全面的分析,探索更加高效的有机磷农药残留检测手段。方法30种(11类)供试蔬果样品分别利用乙腈提取,经QuEChERS净化后,配制溶剂标准工作曲线和基质标准工作曲线,利用气相色谱-串联质谱法(gas chromatography tandem mass spectrometry,GC-MS/MS)和超高效液相色谱-串联质谱法(ultra performance liquid chromatography tandem mass spectrometry,UPLC-MS/MS)分析19种有机磷农药的基质效应表现。结果利用GC-MS/MS分析得到的19种有机磷农药的溶剂标准曲线及其30种基质标准曲线在10~200μg/L浓度范围内线性关系良好,利用UPLC-MS/MS分析得到的19种有机磷农药的溶剂标准曲线及其30套基质标准曲线在4~100μg/L浓度范围内线性关系良好,所有工作曲线的线性相关系数(r2)均大于0.99;利用GC-MS/MS分析时,大部分供试农药在供试基质中呈较强的基质增强效应,其中水胺硫磷的基质效应最强,西葫芦可以有效校正供试农药的基质效应;利用UPLC-MS/MS分析时,供试农药以弱基质效应表现为主,西葫芦对供试农药基质效应的校正能力不明显。结论在利用GC-MS/MS检测供试有机磷农药时,可用西葫芦配制基质匹配标准溶液进行定量分析;在利用UPLC-MS/MS检测供试有机磷农药时,除了乙酰甲胺磷、乐果、敌敌畏、亚胺硫磷,其他农药均可利用溶剂标准溶液进行定量分析。展开更多
文摘AIM: To study the expression of ether à go-go (Eag1) potassium channel in colorectal cancer and the relation- ship between their expression and clinico-pathological features. METHODS: The expression levels of Eag1 protein were determined in 76 cancer tissues with paired non- cancerous matched tissues as well as 9 colorectal adenoma tissues by immunohistochemistry. Eag1 mRNA expression was detected in 13 colorectal cancer tissues with paired non-cancerous matched tissues and 4 colorectal adenoma tissues as well as two colorectal cancer cell lines (LoVo and HT-29) by reverse transcription PCR. RESULTS: The frequency of positive expression of Eag1 protein was 76.3% (58/76) and Eag1 mRNA was 76.9% (10/13) in colorectal cancer tissue. Expression level of Eag1 protein was dependent on the tumor size, lymphatic node metastasis, other organ metastases and Dukes’ stage (P < 0.05), while not dependent on age, sex, site and degree of differentiation. Eag1 protein and mRNA were negative in normal colorectal tissue, and absolutely negative in colorectal adenomas except that one case was positively stained for Eag1 protein. CONCLUSION: Eag1 protein and mRNA are aberrantly expressed in colorectal cancer and occasionally expressed in colorectal adenoma. The high frequency of expression of Eag1 in tumors and the restriction of normal expression to the brain suggest the potential of this protein for diagnostic, prognostic and therapeutic purposes.
基金Supported by the Plan of Wenzhou Science and Technology(No.Y20160439)
文摘AIM：To quantify the association between diabetes and glaucoma using Meta-analysis.METHODS：Pub Med and Embase were searched using medical subject headings and key words related to diabetes and glaucoma.The inclusion criteria were：1）the study design was a prospective cohort study;2）the exposure of interest was diabetes;3）the outcome of interest was primary open angle glaucoma（POAG）;4）risk ratios（RR）and the corresponding 95%confidence interval（CI）.Data were pooled using fixed effects models to take into account heterogeneity between studies.Seven prospective studies were selected.Diabetes increased the incidence of glaucoma by 36%（OR=1.36,95%CI=1.25-1.50）.There was no evidence of statistical heterogeneity（I2=0,P=0.53）or publication bias（the funnel plot did not identify obvious asymmetry）.RESULTS：Seven prospective cohort studies were incorporated in this Meta-analysis.The pooled RR of the association between POAG and diabetes based on the risk estimates of the seven cohort studies was 1.36（95%CI=1.24-1.50）,with no significant heterogeneity across studies（I2=0;P=0.526）.The sensitivity analysis yielded a range of RRs from 1.34（95%CI=1.22-1.48）to1.40（95%CI=1.18-1.67）.CONCLUSION：Diabetes is associated with a significantly increased risk of glaucoma.
基金Supported by the Plan of Wenzhou Science and Technology(No.Y20160439)
文摘AIM：To compare the diagnostic performance of isolatedcheck visual evoked potential（ic VEP） and standard automated perimetry（SAP）,for evaluating the application values of ic VEP in the detection of early glaucoma.METHODS：Totally 144 subjects（288 eyes） were enrolled in this study.ic VEP testing was performed with the Neucodia visual electrophysiological diagnostic system.A 15% positive-contrast（bright） condition pattern was used in this device to differentiate between glaucoma patients and healthy control subjects.Signal-to-noise ratios（SNR） were derived based on a multivariate statistic.The eyes were judged as abnormal if the test yielded an SNR≤1.SAP testing was performed with the Humphrey Field Analyzer II.The visual fields were deemed as abnormality if the glaucoma hemifield test results outside normal limits;or the pattern standard deviation with P〈0.05;or the cluster of three or more non-edge points on the pattern deviation plot in a single hemifield with P〈0.05,one of which must have a P〈0.01.Disc photographs were graded as either glaucomatous optic neuropathy or normal by two experts who were masked to all other patient information.Moorfields regression analysis（MRA） used as a separate diagnostic classification was performed by Heidelberg retina tomograph（HRT）.RESULTS：When the disc photograph grader was used as diagnostic standard,the sensitivity for SAP and ic VEP was 32.3% and 38.5% respectively and specificity was 82.3% and 77.8% respectively.When the MRA Classifier was used as the diagnostic standard,the sensitivity for SAP and ic VEP was 48.6% and 51.4% respectively and specificity was 84.1% and 78.0% respectively.When the combined structural assessment was used as the diagnostic standard,the sensitivity for SAP and ic VEP was 59.2%and 53.1% respectively and specificity was 84.2% and 84.6% respectivlely.There was no statistical significance between the sensitivity or specificity of SAP and ic VEP,regardless of which diagnostic standard was based on.CONCLUSION�
基金Supported by the National Basic Research Program of China(Nos.2012CB721105,2011CBA00802,2007CB714301)the National Natural Science Foundation of China(No.30873400)the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20090032110015)
文摘In vitro antioxidant activities of resveratrol and piceid against peroxynitrite（ONOO-） were examined by the inhibition of 3-nitrotyrosine formation.Trolox was used as a positive control.Resveratrol and piceid exhibited high ONOO--scavenging activities in a concentration dependent manner.The antioxidant activities（the concentration of test compound required to yield a 50% inhibition of tyrosine nitration,IC 50） of resveratrol and piceid against ONOO-were（48.34±0.97） and（74.69±1.49） μmol/L,respectively.Compared with that of trolox[（105.40±1.16） μmol/L],their scavenging activities were 2.2-and 1.5-fold higher for resveratrol and piceid.Formation of nitroresveratrol as shown by UV-Vis spectroscopy and liquid chromatography-tandom mass spectrometry（LC-MS/MS） analysis indicates that resveratrol could directly scavenge ONOO-via nitration reaction.Our results demonstrate that foods and medicinal herbs with resveratrol and piceid as stronger ONOO-scavengers are valuable ingredients and have healthy application in preventing humans from peroxynitrite-mediated oxidative damage by scavenging peroxynitrite efficiently.
基金Project supported by the National Natural Science Foundation of China(Nos.10632040 and 11472163)the National Key Basic Research Project of China(No.2014CB04623)the Shanghai Municipal Commission of Eduction(No.13ZZ067)
文摘Scale effects are studied on the buckling behavior of bilayer composite plates under non-uniform uniaxial compression via the nonlocal theory. Each isotropic plate is composed of a material that is different from others, and the adhesive between the plates is modeled as the Winkler elastic medium. According to the symmetry, effects of the Winkler non-dimensional parameter, the thickness ratio, the ratio of Young＇s moduli, and the aspect ratio are also considered on the buckling problem of bilayer plates, where only the top plate is under the uniaxial compression. Numerical examples show that the Winkler elastic coefficient, the thickness ratio, and the ratio of Young＇s moduli play decisive roles in the buckling behavior. Nonlocal effect is significant when the high-order buckling mode occurs or the aspect ratio is small.
文摘InG sP/G s SCH SQW lasers have been prepared by LP-MOCVD. The dependence of t hreshold current density on cavity length was explained. Laser diodes are char acterized by the output power of 1 W to 2 W, threshold current density ( J th ) of 330 A/cm 2 to 450 A/cm 2 and external differe ntial quantum efficiency ( η d) of 35% to 75%, and these characteristics ar e in good agreement with the designed requirement.
基金supported by the National Natural Science Foundation of China (60432010, 60872051)the National Basic Research Program of China (2007CB307103)
文摘This article proposes a cooperative relaying strategy to efficiently utilize the relaying resources of Interact service providers （ISPs）, speedup distribution and save server bandwidth costs. ISPs cooperatively relay for each other, and peers assist in distributing and fetching the content as near as possible. Base on the fluid model, a constrained model is derived to get optimized global distribution performance in the channel-based system with limited relaying resources. The multi-objectives of the model are minimizing the average distribution time and the distribution time of the slowest channel. Genetic algorithm （GA） is designed to solve the optimization problem. The relaying strategy based on GA can be run periodically to update the allocation policy of ISPs. The distribution performance of the relaying strategy is analyzed in the experiments and results show that GA can provide proper solutions for various network topologies.
文摘目的通过对常见蔬菜水果中有机磷农药的基质效应进行全面的分析,探索更加高效的有机磷农药残留检测手段。方法30种(11类)供试蔬果样品分别利用乙腈提取,经QuEChERS净化后,配制溶剂标准工作曲线和基质标准工作曲线,利用气相色谱-串联质谱法(gas chromatography tandem mass spectrometry,GC-MS/MS)和超高效液相色谱-串联质谱法(ultra performance liquid chromatography tandem mass spectrometry,UPLC-MS/MS)分析19种有机磷农药的基质效应表现。结果利用GC-MS/MS分析得到的19种有机磷农药的溶剂标准曲线及其30种基质标准曲线在10~200μg/L浓度范围内线性关系良好,利用UPLC-MS/MS分析得到的19种有机磷农药的溶剂标准曲线及其30套基质标准曲线在4~100μg/L浓度范围内线性关系良好,所有工作曲线的线性相关系数(r2)均大于0.99;利用GC-MS/MS分析时,大部分供试农药在供试基质中呈较强的基质增强效应,其中水胺硫磷的基质效应最强,西葫芦可以有效校正供试农药的基质效应;利用UPLC-MS/MS分析时,供试农药以弱基质效应表现为主,西葫芦对供试农药基质效应的校正能力不明显。结论在利用GC-MS/MS检测供试有机磷农药时,可用西葫芦配制基质匹配标准溶液进行定量分析;在利用UPLC-MS/MS检测供试有机磷农药时,除了乙酰甲胺磷、乐果、敌敌畏、亚胺硫磷,其他农药均可利用溶剂标准溶液进行定量分析。
文摘目的 探讨康复新液联合注射用矛头蝮蛇血凝酶治疗胃溃疡出血的临床疗效。方法 选取2020年12月—2021年12月在中国人民解放军南部战区总医院治疗的86例胃溃疡出血患者,按照治疗方法不同将所有患者分为对照组和治疗组,每组各43例。对照组患者静脉注射注射用矛头蝮蛇血凝酶,将1单位注射用矛头蝮蛇血凝酶溶于10 m L 0.9%氯化钠溶液中,2次/d。治疗组在对照组基础上口服康复新液,10 mL/次,3次/d。两组患者连续治疗3 d。观察两组的临床疗效,比较两组的止血时间、再出血发生率、凝血功能、血清学指标。结果 治疗后,治疗组总有效率为95.35%,显著高于对照组的总有效率81.39%(P<0.05)。治疗后,治疗组止血时间明显短于对照组,再出血发生率低于对照组(P<0.05)。治疗后,两组患者血浆活化部分凝血活酶时间(APTT)、凝血酶原时间(PT)均明显短于治疗前,纤维蛋白原(FIB)水平明显高于治疗前(P<0.05);治疗后,治疗组APTT、PT明显短于对照组,FIB水平明显高于对照组(P<0.05)。治疗后,两组血管内皮生长因子、表皮生长因子受体水平均明显高于治疗前(P<0.05);治疗后,治疗组血管内皮生长因子、表皮生长因子受体水平明显高于对照组(P<0.05)。结论 康复新液联合注射用矛头蝮蛇血凝酶治疗胃溃疡出血疗效确切,可缩短胃溃疡出血患者止血时间,改善凝血功能。
